So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire.
Three way light switch connection.
A four way switch has an extra common screw to bring the total number of screws up to four.
With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.
Three way switches can be wired in a number of different ways depending on where they are located relative to the light fixture in the circuit cable runs.
Although a 3 way is one of the hardest electrical circuits to figure out it s also one of the most useful.
This might seem intimidating but it does not have to be.
Before proceeding make sure you are comfortable working with electrical wires and switches.
Pick the diagram that is most like the scenario you are in and see if you can wire your switch.
Building a new workshop that is detached from home.
Three way switch wiring.
Wiring a 3 way light switch.
For example they can be arranged so that the feed cable runs to the first three way switch then to the light fixture box then to the second three way switch.
There are several ways to install a 3 way light switch.
The methods shown here are some of the safest and most versatile though not the only options.
I have a outside light by the door going out of the home that is controlled by a single pole switch.
Three wire cable runs between the switches and the outlet.
This circuit is wired the same way as the 3 way lights at this link.
A 3 way wall switch controls a common light or set of lights from two separate switch locations.
A 3 way light switch allows you to control a light source from two separate points.
Three way switch diagrams fully explained wiring 3way switches 3 way switches are a convenient way to operate lighting fixtures from two locations.
Take a closer look at a 3 way switch wiring diagram.
With these diagrams below it will take the guess work out of wiring.
3 way switched outlet wiring.
In this diagram two 3 way switches control a wall receptacle outlet that may be used to control a lamp from two entrances to a room.
Two common screws and two brass screws not counting the ground screw.
Interested in a 4 way switch wiring diagram.
Two 3 way switches are required in any 3 way application.
Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches.
Run new cable romex between the 3 way switches.
How would this be wired.
Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram.
This guide highlights the procedures for replacing a broken 3 way electrical switch.